Answer:
Your answer is right. The sequence has a pattern of -4 every time, so it's A
For 16 it's 8/10 for 17 it's 52/100 for 18 it's -92/100 for 19 it's -48/100 for 20 it's 86/100 for 21 it's 76/100
Step-by-step explanation:
Imagine this segment, given that m is the midpoint of segment JK...
J________M________K
JM = 7x-32 MK = 89 - 4x (given)
If m is the midpoint, then JM and MK are the same lengths (equal to each other). We can use that to first find what <em>x</em> is.

Steps to find x (we have to get x by itself):



(we haven't found the answer yet! we only found x)
Now that we found x, we can find segment MK. Now we know that:

Let's plug x into the equation:

Answer: 